There's something romantic about the image of two young valentines, in an idyllic pastoral scene, etching their initials in the side of a tree to commemorate their affection, but tree carving isn't just for lovers. In a burgeoning field of archeological study, researchers are looking to some of the world's oldest tree carvings, known as arborglyphs, to better understand the peoples and traditions of cultures past -- and most are a lot more interesting than just a heart with an arrow through it.
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